Table of contents

1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

20. Adaptive Immunity

Introduction to T Lymphocytes

Microbiology

20. Adaptive Immunity

Introduction to T Lymphocytes

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Multiple Choice

What is the importance of the variable region of T-cell receptors?

The variable region is the closest region to the cell's surface and stabilizes the receptor in the plasma membrane.

The variable region directly binds to antigens.

The variable region varies in its amino acid sequence allowing different TCRs to bind different antigens.

The variable region directly binds to antibodies.

A and B.

B and C.

C and D.

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Verified step by step guidance

Understand the structure of T-cell receptors (TCRs). TCRs are composed of two chains, each having a constant and a variable region. The variable region is crucial for antigen recognition.

Recognize the role of the variable region in antigen binding. The variable region of TCRs is responsible for directly binding to antigens, allowing the immune system to recognize and respond to a wide array of pathogens.

Explore the diversity of the variable region. The amino acid sequence of the variable region varies greatly among different TCRs, enabling the immune system to generate a diverse repertoire of receptors that can bind to different antigens.

Clarify the misconception about antibody binding. TCRs do not bind directly to antibodies; instead, they interact with antigens presented by other cells, such as antigen-presenting cells.

Identify the correct statements. Based on the explanations, the correct importance of the variable region of TCRs is that it directly binds to antigens (B) and varies in its amino acid sequence allowing different TCRs to bind different antigens (C).